Avoid jumpy clock for latency measurements

1 files changed, 2 insertions, 2 deletions

diff --git a/vespa-feed-client/src/main/java/ai/vespa/feed/client/BenchmarkingCluster.java b/vespa-feed-client/src/main/java/ai/vespa/feed/client/BenchmarkingCluster.java
index 0e9bfe0ef46..840219a6bf1 100644
--- a/vespa-feed-client/src/main/java/ai/vespa/feed/client/BenchmarkingCluster.java
+++ b/vespa-feed-client/src/main/java/ai/vespa/feed/client/BenchmarkingCluster.java
@@ -40,14 +40,14 @@ public class BenchmarkingCluster implements Cluster {
     @Override
     public void dispatch(HttpRequest request, CompletableFuture<HttpResponse> vessel) {
         requests.incrementAndGet();
-        long startMillis = System.currentTimeMillis();
+        long startNanos = System.nanoTime();
         delegate.dispatch(request, vessel);
         vessel.whenCompleteAsync((response, thrown) -> {
                                      results++;
                                      if (thrown == null) {
                                          responses++;
                                          responsesByCode[response.code()]++;
-                                         long latency = System.currentTimeMillis() - startMillis;
+                                         long latency = (System.nanoTime() - startNanos) / 1_000_000;
                                          totalLatencyMillis += latency;
                                          minLatencyMillis = Math.min(minLatencyMillis, latency);
                                          maxLatencyMillis = Math.max(maxLatencyMillis, latency);